Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

to see how many photos your camera has captured
have your sd card unlocked
power on camera with <alt> button
press <alt> again so you can see an captured image
press <set> and <display> to see your chdk needed version and press one more <display> so you can see how many photo shots you have without letting <set> button